OK , I am happy to talk with you. now I just simulate the beer completely but I get other troubles. How to give the foam and beer map and then what kind of format does RealFlow output to C4D?Please can you give a video tutorial to teach me work out ?

the meshing of the two different particle types, beer or foam, is the first step. You can put several beer emitters into one mesh and the foam emitter into another one. Then set the export options in "export central" to "bin" files for the import into Cinema4D. Alternatively you can use the render kit functions of the import plugins to create the mesh directly in Cinema4D. The pipeline between C4D and Realflow is explained in detail in this video, for examplehttps://youtu.be/Kj019HNwD0w3D Fluff studios have a convincing Beer+Foam rendering tutorial in their store:https://youtu.be/JGtC4GkRv4s